Lock.



H. G. VOIGHT.

LOCK;

APPLICATION FILED DEC. 4. lens.

1,207,450. Patented Dec. 5,1916.

5 6/ 25 2 59 E 9 m 60 MI 5 "I 56 7 v & ezaz fianm I a pm i E ll 37-iiffi' WITNESS all UNITED STATES PATENT OFFICE.

HENRY G. VOIGHT, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR T0 SARGENT & COM-PANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Specification of Letters Patent.

Patented Dec. 5, 1916.

Original application filed. March 13, 1915, Serial No. 14,124. Dividedand this application filed December 4, 1915. Serial No. 65,058.

To all whom it may concern:

Be it known that I, HENRY Gr. VOIGHT, of New Britain, county ofHartford, and State of Connecticut, have invented certain new and usefulImprovements in Locks, of which the following is a full, clear, andexact description.

This invention relates to locks and more especially to master keyedcylinder locks.

My improved cylinder can be used advantageously with mortise locks ofthe type disclosed in my application, Serial No. 14,124, of which the.present application is a division, and with various other types ofmortise locks where an emergency key or a shut-out key is used inaddition to the change key.

One of the primary objects of the present invention is to provide amaster keyed cylinder lock having a plurality of rollbacks, and aplurality of keys, said rollbacks rotatable together by any of saidkeys, and one of said rollbacks being movable radially oi' the cylinderlock, and of the other rollback by one of said keys, which is of lesslen th than the keyway but not by another oi said keys.

The invention also has in view the general improvement of locks of themaster keyed cylinder type.

To these and other ends, the invention consists of the novel featuresand combinations of parts to be hereinafter described and claimed.

In the accompanying drawing, Figure 1 is a rear elevation of a cylinderlock embodying my improvements, showing a portion of the mortise lockmechanism described in my application Serial No. 14,124 hereinbeforementioned; Fig. 2 is a section on line 2-2 of Fig. 1, showing the masterkey (maids key) in the lock; Fig. 3 is a sectional view of the rearportion of the cylinder lock showing the rollbacks actuated by themaster key; Fig. 4 is a view generally similar to Fig. 2, showing therollbacks actuated by'the emergency key; and Fig. 5. is a view similarto Fig. 1, showing the rollbacks actuated by the emergency key.

My improved cylinder lock comprises a case 25 containing a key plug 54surrounded by an eccentric sleeve 55, and the key plu and sleeve areadapted to be locked to the case by the customary sectional pin tumblers56. The arrangement is such that at least one key will rack the pintumblers so as to rotate the key plug individually, while at least onekey will rack the pin tumblers so as to rotate the key plug and sleevetogether. rotates on the axis of the sleeve rather than its own axis,and it is to be noted that the axis of the sleeve is disposed somewhatabove the axis of the key plug. A dog or rollback 57 is secured to therear end of the key plug by screws 58, and is provided with a radial armcarrying a projection '59, which, in the present case, is adapted toengage a projection 44 on a tumbler 42.

The projection 59 on the rollback 57 extends In this last case, the keyplug rearwardly from said rollback, as best shown in Fig. 2. Another dogor rollback 60 is adapted to rotate on the axis of the sleeve 55 andcomprises a ring-like body portion loosely encircling the rear extremityof the sleeve and carrying a radial arm 61 with rearwardly directed sideflanges, between which the arm of the rollback 57 is confined. Therollback 57 may be termed the emergency rollback, because it is adaptedto operate the emergency tumbler 42, while the rollback 60 may be termedthe regular or ordinary rollback because it is adapted to engage anordinary tumbler 41 of the mortise lock mechanism. It will be understoodthat the operating movement of the rollback 60 is imparted to it byreason of the fact that it is interlocked with the arm of the emergencyrollback 57, as described, said emergency rollback being rotatable byall of the keys adapted to the lock because it is fixed to the key plug.The interlocking of the arm of the emergency rollback between theflanges 62 of the regu lar rollback permits independent radial movementof said rollbacks when the key plug rotates on its own axis instead ofon the axis-of the sleeve, as will be understood.

In Fig. 2, I have shown a key 64 inserted into the cylinder lock. In theparent application, Serial No. 14,124, this key is referred to as amaids key, but it might be used just as well as a change key, and, inthe present case, it will be referred to by the latter term in order tosimplify the description. In the particular case illustrated, this keyracks the pin tumblers in such a manner as to interlock the key plug andsleeve, and release the sleeve from the case so that the plug and sleeveare free to rotate 0n the longitudinal axis oi the sleeve. in actuatingthe rollbacks 57, 60, they both rotate on the axis of the sleeve andmaintain the same relation to each other so that when the key has been:2 turned through half a revolution, the roll- 7 backs.

backs will actuate the respective llllll'lblGIfS 4:2, ll in the mannershown in Fig. 3. The key 65, shown in Fig. l, is referred to herein asan emergency key, and it is adapted to rack the pin tumblers 56 in sucha manner as to release the key plug individually so that it can rotateon its own axis. In actuating the cylinder lock by the emergency key, asshown in Figs. 4L and 5, the sleeve remains stationary but bothrollbacks 57, 60 are rotated because of the interlocking engagement ofthe rollback 60 with the operating rollback 57. Here the two rollbacksrotate on different axes, however, the axis of rotation of 57 beinglower than that of (30, so that when the key is turned in the lock therollback 57 will be moved radially outward and downward relatively tothe rollback 60. In this manner, the projection 59 on rollback 57 ismoved outward in the grooved arm of rollback 60 so that it approachesthe extremity of said arm more nearly than in the case shown in Fig. 3.-Thus, the rollback 57 depresses the tumbler e2 to a much greater extentwhenthe emergency key is used ("Fig-1.4:) than when the change key isused (Fig. As 'the key is moved back to the initial position theprojection 59 is inove'dradially inward until it again occupies itsoriginal position; The difference in theamplitude of movement of thetumbler 4L2 when actuated by the two different keys is utilized ingiving the lock the necessary emergency release and shut-out functionsas described in the parent application, altliou'gh it is manifest thatthe cylinder herein described may be used in connection with varioustypes of locks, where different keysdiave different functions.

:It will be observed that by my improved construction, I am enabled tomove one rollback radially of another by a short key which is of lesslength than the keyway anddoes not pass through either of said roll- Itwill also be observed that the member 57 or, its equivalent has adoublefunction, that is to say, it serves as an operator for the rollback 60or its equivalent, and also as an additional rollback.

Various changes in the. details of the con struction may beadoptedwithout departing from the scope of the invention as defined inthe claims. I

flVhat I claim is: f1. The combination with a cylinder lock and aplurality of-keys therefor, of a .p'ltirality of rollbacks on saidcylinder lockall r'otatable'by all of said keys, one ofsai-d roll hacksbeing l'IlOYHblG radially oi the other by a short key which is oi? lesslength than the key Way and means to prevent movement of said firstroll-back radially of such other rollback by another oi said keys;substantially as described.

2. A cylinder lock having a plurality oi? rollbacks permanel'itlysecured to the rear end thereoi? and. a plurality of keys, one of saidrollbacks being located at the rear of the other and having a rearwardlydirected bolt-operating projection, and means for moving said last-namedrollback radially of the other rollback by one of said keys saidrollbacks being immovable relatively to each other by another ofsaid-keys; sub stantially as described.

The combination with a cylinder lock and a plurality of keys therefor,of two rollbacks on the rear end of said cylinder lock. both rotatableby all of said keys, one of said rollbacks located rearwardly of theother and having a rearwardly directed boltoperating projection, theother rollback projecting radially beyond the first-named rollback, andthe first rollback being movable radially of the second rollback by ashort key which :is of less length than the keyway substantially asdescribed.

4:. A cylinder lock having a rollback with a radial guide-way, arollback projection engaging said guide-way, and a key for positivelymoving said rollback projection outwardly and inwardly in saidguide-way; substantially as described.

A cylinder lock having a rollback with a radial guide groove, a secondrollback at the rear of the first having an arm engaging said groove,and a rearwardly directed boltoperating projection on said arm, and akey for moving'said bolt-operating projection inward as well as outwardin said 1 groove; substantially as described.

6. In a cylinder lock, the combination of a key plug, a sleeve, arollback fixed to the key plug, and a rollback loose on the sleeve,actuated by said first rollback; substantially as described.

7 Acy'linder lock having a plurality of rollbacks permanently secured tothe rear end thereof, aplurality of keys, and means for giving one ofsaid rollbacks a radial movement relatively to the other by one of saidkeys, said first rollback being moved positively in an inward directionrelatively to said second rollback by means of said key as well as in anoutward direction, but being immovable relatively to said secondrollback by another of said keys; substantia-ll y as described.

In witness whereof, I have hereunto set my hand on the 2nd day ofDecember, 1915.

5 HENRY G. VOIGHT.

.Gopies '01 this patent may he. obtained tonfive cents eaclnhy addr ngthe Commissioner of Paten s, Washington, D. G.

llO

